Line an 8x8 or 9x9” pan with foil, wrapping around sides of pan and spray with cooking spray.

Place the Reeses' peanut butter cups, broken pretzels and Rolos' in an even layer on the bottom of the pan.

Pour chocolate chips and sweetened condensed milk in a medium saucepan over low heat. Stir constantly over low heat until melted.

Remove saucepan from heat and stir in vanilla extract.

Spread evenly over candy and pretzels in prepared pan. pressing lightly to adhere them with waxed paper or your hands. The fudge will set up fast, so work a fast pace when you are spreading the fudge on top of the candy and pretzels.

Cool until firm to room temperature, then cover and place in the refrigerator to harden completely. Cut into squares and serve.